Indonesia’s Mount Semeru has unleashed a dangerous lahar, a fast-moving flow of rainwater mixed with volcanic debris, triggered by last week’s eruption. Authorities urge residents to avoid river corridors near Gladak Perak amid secondary explosions and evacuations. | Al Jazeera English
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Fast-moving lahars are now racing down several slopes of Mount Semeru after a secondary eruption earlier today, Nov. 23, 2025. Witnesses report ground vibration, deep atmospheric sound, and rapid volcanic mudflows carrying ash, rocks, and debris at dangerous speeds. Authorities are monitoring conditions closely as lahar channels continue to fill. If you live near rivers or drainage paths around Semeru — stay alert, stay prepared, and prioritize safety. 🙏🌋 #Semeru #SemeruEruption #Indonesia #Vo
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